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4 SEAL TRAP.

No. 244,942. v Patented July 26,1881.

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UNITED STATES PATENT OFFICE.

ORLANDO W. SPRATT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF SEVEN-EIGHTHS TO OTHNIEL B. EVANS, OF SAME PLACE.

SEAL-TRAP.

SPECIFICATION forming part of Letters Paten't No. 244,942, dated July 26, 1881.

Application filed March 1-9, 1831.

To all whom it may concern Be it known that I, ORLANDO W. SPRATT, a citizen of the- United States, residing in the city and county of Philadelphia, Stateof Pennsylvania, have invented a new and useful Improvement in Seal-Traps for Wash-Basins, &c., which improvement is fully set forth in the following specification and accompanying drawing, in which the figure is a central vertical section of the trap embodying my invention.

My invention consists of a seal-trap having. in its base an opening the wall whereof is turned ,upward to form a gutter for-the sealing medium, a rising and falling valve adapted to dip into the seal and envelop the top of the inductiolrpipe, the latter entering the chamber from below, and the eduction-pipe leading from said chamber at a point above the valve. The upper edge of the gutter forms a bearing for the top flange of the induction-pipe, which is passed through the bottom openingofthechamber formed by the wall of the gutter. v

Referring to the drawing, A represents a. chamber having an open bottom or base, the wall aof which extends upwardly and forms a gutter, B, in which is placed mercury or other scalin g medium.

0 represents the ind notion-pipe, which leads from the wash-basin, sink, &c.,and opens into the chamber A at the base thereof; and D represents the eduction-pipe, which leads from the side of the chamber A to the sewer, 850., the upper end of theinduction-pipehavingaflange, b, which abuts against the edge of the wall a of the gutter B for connecting and sustaining purposes.

Within the chamber A is a hollow or tubular valve, E, Whose lower edge dips into the gutter B as its seat, it being noticed that the top of said valve is closed, and the upper end of the pipe 0 projects into the valve above the edge 0 said gutter B, so as to be covered by the valve. l

The top of the chamber is closed by means of a cap, A,,which is removable for the purpose of' locating the pipes G D and valve E (No model.)

and supplying the gutter B with the mercury or sealing medium.

The chamber A and valve E may be made of glass, and the pipes O Dof metal, the proper 5c parts being suitably packed to produce tight joints.

The operation is as follows: The water or fluid from the wash-basin,&c.,enters the pipe 0 and raises the valve E, and, reaching the pipe 5 5 D, escapes from the chamber to the sewer, Ste. When the flow stops the valve seeks its seat, and is thus'sealed in the mercury, &c.,.in the gutterB, water orfluid, to the level of the lower line of the pipe D, remaining in the chamber 6c and submerging the valve, it being evident that the noxious vapors in the chamber cannot reach the induction-pipe. Should there be any sewergas or back-pressure from the sewer it is contained in the chamber, the pressure exerted forcing the valve more firmly on its seat, thus insuring the reliability of the sealed joint and preventing the gas enterin g the induction-pipe and apartment.

Having thus described my invention, what I claim as new,and desire to secure byLettcrs Patent, is-

1. The chamberA, having in itsbasean opening, the wall whereof is turned upwardly, formin g the gutter, which contains the seal,incom- 7 bination with the induction-pipe 0, passed through the base of the chamber A, the valve E, dipping into the sealand enveloping the top of the induction-pipe, and the eductionpipe leading from the chamber above said valve, substantially as set forth.

2. The chamber A,having at its bottom the gutter B and the upwardly-turned part a, in combination with the valve E, which setsinto said gutter, and the induction-pipe 0, which 8 5 is provided on its upper end with flange b that -rests on said part a, substantially as set forth.

ORLANDO W. SPRATT.

Witnesses ALFRED TAYLOR, 0. B. EVANS. 

